<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>CSS</title>
    <!-- 1.内嵌样式 -->
    <style>
        h1 {
            color: yellow;
            background-color: red;
        }
        h2 {
            color: green;
            background-color: pink;
        }
    </style>
    <!-- 外链一个css文件
    link  点击Tab键 生成元素结构 -->
    <link rel="stylesheet" href="css/demo12.css">
</head>
<body>
    <h1>达内</h1>
    <h2>Linux云计算</h2>
    <h3>NSD2404</h3>
    <!-- 行内样式 -->
    <h4 style="color: purple;background-color: skyblue">HTML+CSS+JS</h4>
    <p style="font-size:14px;">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Doloribus error, esse reprehenderit repudiandae sapiente voluptas. Aut earum eveniet excepturi nesciunt nostrum pariatur quia rerum sit sunt veritatis. Cupiditate magnam, quae?</p>
</body>
</html>